Figure 1.
Survey data and specimen collection schedule for each study household, relative to the enrollment date of the household's index cholera infection (study day 1).
The “*” denotes the day on which stool/rectal swab specimens were only collected from the index cholera infections.
Figure 2.
Schematic illustration of the transmission model.
The probability represents the daily risk that a susceptible contact (hollow figure) will subsequently develop cholera infection by serogroup-serotype v after exposure to household surfaces or water/food supplies contaminated by a member infected with and shedding v (black figure). The probability
represents the susceptible contact's daily risk of cholera infection resulting from exposure to sources of infection located outside of his/her household. The corresponding epidemiologic summary measures for
and
are the household secondary attack rate, or
, and the community probability of infection, or
(see the text for parameter definitions).
Table 1.
Descriptive statistics for the study population.
Figure 3.
The number of days between the illness onset dates of household primary and non-primary symptomatic Vibrio cholerae cases (all serogroup-serotypes).
Primary symptomatic cholera cases are defined as enrolled household members meeting the case definition for a symptomatic cholera case and whose symptom onset date was on or before that of the household's index infection. All other symptomatic cholera cases are classified as non-primary. The horizontal line represents the interquartile range (25th through the 75th percentile), with the median denoted by the vertical crossbar.
Table 2.
Covariate effects estimated by the univariate and multivariate transmission models.